2838699 - Error when trying to create a record for a custom MDF Object - ???Saving of 1 [MDF Object] throwed a Exception???

When trying to create a record for a custom MDF object, the system is throwing the following error: ???Saving of 1 [MDF Object] throwed a Exception???

SAP SuccessFactors HXM Suite

1. Access Manage Data;
2. In the Create New dropdown, select the custom MDF object;
3. Insert the data and try to save;
4. Receive the error.

The external code of the custom MDF object or any of its child objects is set as a non-unique data type.

The external code needs to be set as a type which will grant the uniqueness of each record of that object.

If you select, for example, Picklist as the data type, there will be a limitation in the number of records that can be created, because it will not be possible to have two records with the same picklist value selected as the external code.

Saving, Exception, ???Saving, Exception???, External Code, Error, create, record, mdf, custom MDF, object , KBA , LOD-SF-MDF , Metadata Framework , LOD-SF-MDF-OBJ , Object Definition & Field Related Issues , Problem